Software Developer | DevOps | Backend | Web | Python | Databases | Microservices | Linux

I am a Software Developer/Ops professional passionate about innovation,
problem-solving, and continuous learning. My expertise spans Backend,
Microservices, Full Stack Development, Web, IoT, Big Data, Databases, and
Cloud-Native technologies.

• Datenbankentwicklung
• Fastapi
• Groovy
• Linux Entwicklung3 J.
• Mysql
• Nginx
• Postgresql3 J.
• Pyramid
• pySpark
• Python5 J.

I live in Munich and available for new projects

IT skills
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Operation systems
* Miscellaneous Linux based distribution like Debian, Ubuntu, Alpine (for docker) ...
* Windows, iOS
Programming, markup languages and tools
Favorite programming languages
* :ref:`python` (including common of libs and frameworks), Groovy/JVM
* I am also familiar with Java, JavaScript, PHP and C
Markups
* (X)HTML, CSS, Chameleon, Zope Page Templates, GSP, JSP, Jinja2, DTML, RestrucuredText(REST) / Sphinx ...
* and data exchange standards like JSON, XML, JWT, ...
Frameworks / libraries
* Pyramid, FastAPI, aiohttp, asyncio, Vert.x, Grails, Zope2, zope, Scrapy, pySpark, Bootstrap, pytest, unittests...
* also experience with Django, Plone, Flask, Tornado, AngularJS
Concepts, architectural styles and patterns
* RESTful, API, RPC, oauth
* client-server, event-driven, microservices
* monolithic application, peer-to-peer, service-oriented etc...
Ops, admin, build, CI/CD etc.
* Docker, Compose, Jenkins, Concourse-ci
* Experience Hashicorp (Terraform, Nomad, Packer, Consul), kubernetes (learning in progress).
* GIT, Mercurial (hg), SVN, Gradle, pip, setuptools
* Bitbucket, GitHub, CI /CD, redmine, Atlassian stack
Relational databases (RDBMS)
* Knowledge of SQL and many successful projects based on: PostgreSQL, MySQL
* ORM-Mappers like SQLAlchemy, Django ORM, GORM, Hibernate, HQL
NoSQL / In Mem Grids / Queues
* Knowledge of: MongoDB, Cassandra, ZODB, etc...
* RabbitMQ, Hazelcast, Kafka, Redis, Memcached
High Available, Web, Cache, Proxys and Load-balancer, Clustering, Cloud
* Successful projects with components like: Nginx, Apache, Memcached, Varnish, Pound, HAProxy, Heartbeat/Linux-HA, Squid
* Docker, Linux Containers (LXC), KVM, QEMU, virtlib, cgroups, Hashicorp Stack (Nomad, Consul, Vault), K8s(in progress)
* Experience with Amazon AWS, Google Cloud, Hetzner and Container Repository
Network software, protocols, monitoring, emailing
* Network and software monitoring with: Nagios, Munin, Zabbix etc.
* Tracers/Metrics like Zipkin, Prometheus; Mailing with Exim, Spamassassin, Dovecot, Courier
* Understanding of protocols like DNS, LDAP, TCP, IP, TCP/IP, RPC, HTTP, SSL, REST, FTP, POP, SMTP, IMAP, web-sockets, SockJs, TCP Load Balancing, Routing, Samba
* Experience by using Network aggregation (Cisco/Dell + bonding on linux), BGP
IT-Security
* Certificate and key management with OpenSSL, GnuPG, Letsencrypt.org, JWT, oauth
* Net Filters like iptables/nftables; Diverse Sniffer-tools like wireshark, netcat, tcpdump
* LDAP Authentication (against Microsoft Domain Controller or OpenLDAP)
* Experience with protocols as SSL, :ref:`ssh`, IPSec, VPN
Enterprise / E-Commerce / Ads / SEO
* Dev/Integration of ERP system in company over 250 employers
* Understanding of E-Commerce processes; Integration ERP/CRM systems. Binding E-Pay-Systems like PayPal, Credit Card providers, SEO; Experience with API's of Facebook, Twitter, Google, VK, LinkedIn, Telegram Yandex, Paypal etc; Using * API's; Microdata (schema.org); Understanding of Targeting, remarketing and programmatic concepts (adServer, SSP, DSP etc.)
Testing
* Knowledge of major software testing methods and concepts like unit, integration, functional, acceptance tests etc.
* Most experience with pytest, mocks, junit...
Other
* Successful integration of diverse open source like Redmine, Jira, Bitbucket, Karl, Wikimedia etc
* Using of PEP8, black and other language specific recommendations and IDE’s like Kdevelop, IntelliJ IDEA, Eclipse, VSCode
* Understanding concepts like/of UML, test automation, domain driven design, event bus, message queue etc
* software tracing with OpenCensus, Zipkin, OpenJager etc...
* Web crawlers for large Data collection with with python-scrapy, Beautiful Soup;